Theta Industries, Inc.

Electrostatic Levitator Listing

Theta Industries has been the industry leader in thermal physical properties measurement and manufacturing of scientific test equipment for over 30 years. We remain dedicated to bringing our customers the finest in both software and hardware to create the most advanced thermal analysis equipment available. We offer a full range of instruments from low cost Dilatometers, laser flash diffusivity to high temperature Viscometers.

Levitronic I
2000°C Containerless melting,
contactless measurement.

Principle of Electrostatic Levitation

In electrostatic containerless materials processing a sample is levitated in a high vacuum by electrostatic forces, melted, and various experiments are performed over a broad temperature range around its melting temperature. Since the sample is isolated from container walls, the purity of sample is preserved. The Electrostatic Levitator can process various materials which include metals, semiconductors and insulators. A number of non-contact diagnostic techniques allow measurements of various thermophysical properties as a function of temperature, such as nucleation mechanism as well as formation of metastable crystalline and amorphous phases with novel properties.

Measuring Head

3.1 Video Camera

3.2 IR Detector

3.4 Pyrometer

4 Electrode Assembly

4.1 Specimen Positioner: set of two detectors with feedback control, helium-neon laser illumination.

5 Heat Source: 1KW xenon arc lamp.

Sample Graph

A typical temperature versus time profile for a silicon melt undergoing a purely radiative cooling process, such as the recalescence event.

Bibliography bb 6.1 An electrostatic levitator for high temperature containerless materials processing in 1-g

bb 6.2 Materials Processing by High Temperature Electrostatic Levitation

bb 6.3 A noncontact measurement technique for the specific heat and total hemispherical emissivity of undercooled refractory materials

bb 6.4 Constant-Pressure Specific Heat to Hemispherical Total Emissivity Ratio for Undercooled Liquid Nickel, Zirconium, and Silicon

bb 6.5 Thermophysical Property Measurement of Molten Silicon by High Temperature Electrostatic Levitation

Note: "bb 6.x" are internal Theta reference numbers. Literature available on request.

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Theta Industries, Inc.
26 Valley Road
Port Washington, NY 11050 USA
Phone: 516-883-4088 Fax: 516-883-4599 E-mail: theta@theta-us.com

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Principle of Electrostatic Levitation
	In electrostatic containerless materials processing a sample is levitated in a high vacuum by electrostatic forces, melted, and various experiments are performed over a broad temperature range around its melting temperature. Since the sample is isolated from container walls, the purity of sample is preserved. The Electrostatic Levitator can process various materials which include metals, semiconductors and insulators. A number of non-contact diagnostic techniques allow measurements of various thermophysical properties as a function of temperature, such as nucleation mechanism as well as formation of metastable crystalline and amorphous phases with novel properties.


Measuring Head


3.1	Video Camera
3.2	IR Detector
3.4	Pyrometer
4	Electrode Assembly
4.1	Specimen Positioner: set of two detectors with feedback control, helium-neon laser illumination.
5	Heat Source: 1KW xenon arc lamp.


Sample Graph
	A typical temperature versus time profile for a silicon melt undergoing a purely radiative cooling process, such as the recalescence event.


Bibliography	bb 6.1	An electrostatic levitator for high temperature containerless materials processing in 1-g
	bb 6.2	Materials Processing by High Temperature Electrostatic Levitation
	bb 6.3	A noncontact measurement technique for the specific heat and total hemispherical emissivity of undercooled refractory materials
	bb 6.4	Constant-Pressure Specific Heat to Hemispherical Total Emissivity Ratio for Undercooled Liquid Nickel, Zirconium, and Silicon
	bb 6.5	Thermophysical Property Measurement of Molten Silicon by High Temperature Electrostatic Levitation

	Note:	"bb 6.x" are internal Theta reference numbers. Literature available on request.

Electrostatic Levitator Listing

Levitronic I 2000°C Containerless melting, contactless measurement.

Request More Information

Levitronic I
2000°C Containerless melting,
contactless measurement.